This GM Solenoid is found in Various Transmissions 4L60E, 4T65E, 4T40E, 4T80E, and the Allison In the 4L60E this solenoid is the 3-2 downshift from 1993 to 1994 It is the TCC PWM in vehicles that are later than 1995 In the 4T65E this solenoid is the TCC PWM in 1997 and Later Vehicles In the Allison this solenoid is Solenoid "F" Trim (PWM) 2000-2005 This solenoid is easily identified by its gray color and round connector in the front.